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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_008_636">&nbsp;</a>NAME</h4><blockquote>
siginterrupt - allow signals to interrupt functions
</blockquote><h4><a name = "tag_000_008_637">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="signal.h.html">signal.h</a>&gt;

int siginterrupt(int <i>sig</i>, int <i>flag</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_008_638">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>siginterrupt()</i>
function is used to change the restart
behaviour when a function is interrupted by the specified signal.
The function <i>siginterrupt</i>(<i>sig</i>, <i>flag</i>) has an
effect as if implemented as:
<pre>
<code>
siginterrupt(int sig, int flag) {
    int ret;
    struct sigaction act;

    (void) sigaction(sig, NULL, &amp;act);
    if (flag)
        act.sa_flags &amp;= ~SA_RESTART;
    else
        act.sa_flags |= SA_RESTART;
    ret = sigaction(sig, &amp;act, NULL);
    return ret;
}
</code>
</pre>
</blockquote><h4><a name = "tag_000_008_639">&nbsp;</a>RETURN VALUE</h4><blockquote>
Upon successful completion,
<i>siginterrupt()</i>
returns 0.  Otherwise -1 is returned and
<i>errno</i>
is set to indicate the error.
</blockquote><h4><a name = "tag_000_008_640">&nbsp;</a>ERRORS</h4><blockquote>
The
<i>siginterrupt()</i>
function will fail if:
<dl compact>

<dt>[EINVAL]<dd>
The
<i>sig</i>
argument is not a valid signal number.

</dl>
</blockquote><h4><a name = "tag_000_008_641">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_008_642">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
The
<i>siginterrupt()</i>
function supports programs written to historical system interfaces.
A portable application, when being written or rewritten, should use
<i><a href="sigaction.html">sigaction()</a></i>
with the SA_RESTART flag instead of
<i>siginterrupt()</i>.
</blockquote><h4><a name = "tag_000_008_643">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_008_644">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="sigaction.html">sigaction()</a></i>,
<i><a href="signal.h.html">&lt;signal.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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